作者darkstar0412 (愛貓成痴^^)
看板Grad-ProbAsk
標題[問題] 兩題統計
時間Thu Mar 19 00:08:35 2009
1.for members in a penson plan,the transition matrix of probabilities of
switching funds is
[ 0.65 0.35 ]
P=| 0.25 0.75 ]
0 1 2
if initial probability distribution is P =[0.5 0.5] , find(a)P (b)P
2.T為指數分配,P[T≦2]=2‧P[T>4],試問Var[T]為?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
※ 編輯: darkstar0412 來自: 220.131.1.238 (03/23 03:34)